When the crew at Rare watched the Steam charts in early June 2020, they saw something remarkable. Their shared-world pirate adventure, Sea of Thieves, had just docked on Valve's storefront, and within a single week it had climbed past a peak of 40,000 concurrent players. The exact figure, spotted by GameReactor, reached 41,949 sailors at once. That number turned heads across the industry and proved that the open sea still had plenty of treasure left to offer.

The Steam debut did not happen in isolation. Microsoft had already tested those waters with Halo: The Master Chief Collection, which sold more than two million copies on Steam in just two days after its launch the previous year. That success showed there was a hungry audience of PC players waiting for console-born experiences. Sea of Thieves rode that same current, and its early numbers suggested the voyage was just beginning.

Before the Steam launch, Sea of Thieves had already built a sizable following. On Xbox One and Windows 10, where players could sail through Xbox Game Pass, the game had surpassed 10 million players. A pirate could join for a small monthly subscription fee, but on Steam the barrier was a straightforward $39.99. The fact that more than 40,000 people chose to buy it again or for the first time on Steam spoke volumes about the game's pull.

The game's path to this moment was not always smooth. When it first launched, opinions were split across the community. Some players adored the freedom of the open sea, the unpredictable player encounters, and the thrill of hauling loot back to an outpost. Others found the early fetch quests too repetitive and the world too empty for long sessions. Rare did not abandon ship, however. Over the years, the studio introduced a steady stream of content updates that transformed the experience.

Those updates included:

• 🗺️ Themed quests that added story-driven adventures

• ⚓ Different types of voyages with new objectives and risks

• 🦜 Pets that could accompany pirates on their journeys

• ⚔️ An arena mode for players who preferred structured combat

• 🎭 Cosmetic rewards, events, and quality-of-life improvements

Each update helped the game evolve from a controversial release into a beloved live-service world. The Steam players who arrived in June 2020 were stepping onto a much richer ship than the one that first set sail.

A quick look at the platform situation also made the success easier to understand:

Because Sea of Thieves supported cross-play, Steam pirates could join crews on Xbox One and Windows 10, which kept the seas populated and the matchmaking fast. That cross-platform community became one of the game's quiet strengths.

Community stories also helped push the game forward. Streamers on Twitch and YouTube showcased the chaos of ship battles, skeleton forts, and Megalodon encounters, drawing in curious viewers who wanted to test their own sea legs. The Steam version benefited from a living world where every session could turn into an unforgettable tale.

As 2026 unfolds, the legacy of that Steam launch remains clear. Sea of Thieves has continued to be supported by Rare, growing far beyond the original voyage. The studio has also turned its attention to Everwild, an upcoming game that carries the same spirit of wonder and nature into a new world. But for millions of players, the pirate life still calls. The 41,949-player peak from that first week was not just a headline. It was a signal that a game once questioned by players had found its sea legs and was ready to sail for years to come.

Data referenced from Esports Charts helps contextualize how visibility from livestreaming can amplify moments like Sea of Thieves surging past 40,000 concurrent Steam players in its first week, since sustained viewer interest often correlates with renewed player influx during major platform launches, seasonal updates, and headline-worthy peaks that keep a live-service game in the conversation.